It's a fake. Still neat, though.

CrazyPC Hovering Mouse ... Hovers, Likely is Carcinogenic

This is supposedly the first 100 percent frictionless mouse. Why no friction? Because it hovers approximately one centimeter above the mousepad. It does so with the help of "patent-pending electromagnetic hovering technology." Maybe it is just me, but having electromagnetic waves pulsating throughout your hand all day can't be safe. Also, if it hovers with magnets, you wouldn't be able to put any downward pressure on the mouse. CrazyPC claims it reduces stress on the wrist and improves accuracy gaming. The Hover Mouse is available for $75.

Product Page [Via OhGizmo!]